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Revision 1.4

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AS5263

Datasheet - Application In form atio n

8.1.4 WRITE128

Figure 18 illustrates the format of the frame and the command.

Figure 18. Frame Organization of the WRITE128 Command

The command contains 8 frames. With this command, the AS5263 receives only frames. This command will transfer the data in the special

function registers (SFRs) of the device. The data is not permanent programmed using this command.

Table 16 describe the organization of the OTP data bits.

The access is performed with CMD field set to 0x9. The next 7 frames with CMD field set to 0x1. The 2 bytes of the first command will be written

at address 0 and 1 of the SFRs; the 2 bytes of the second command will be written at address 2 and 3; and so on, in order to cover all the 16

bytes of the 128 SFRs.

Note:

It is important to always complete the command. All 8 frames are needed. In case of a wrong command or a communication error, a

power on reset must be performed. The device will be delivered with the programmed Mem_Lock_AMS OTP bit. This bit locks the

content of the factory settings. It is impossible to overwrite this particular region. The written information will be ignored.

DATA1

DATA0

CMD

LSB

MSB LSB

MSB LSB

MSB

11

00

DATA3

DATA2

CMD

LSB

MSB LSB

MSB LSB

MSB

10

00

DATA5

DATA4

CMD

LSB

MSB LSB

MSB LSB

MSB

10

00

DATA7

DATA6

CMD

LSB

MSB LSB

MSB LSB

MSB

10

00

DATA9

DATA8

CMD

LSB

MSB LSB

MSB LSB

MSB

10

00

DATA11

DATA10

CMD

LSB

MSB LSB

MSB LSB

10

00

DATA13

DATA12

CMD

LSB

MSB LSB

MSB LSB

10

00

DATA15

DATA14

CMD

LSB

MSB LSB

MSB LSB

10

00

MSB

MSB

MSB